diff --git a/test.md b/test.md
new file mode 100644
index 0000000..fda06bd
--- /dev/null
+++ b/test.md
@@ -0,0 +1,678 @@
+## Basic types
+
+### Error 
+
+```proto
+message Error {
+    string code = 1; // One of a server-defined set of error codes.
+    string message = 2; // A human-readable representation of the error.
+    string target = 3; // The target of the error.
+    repeated Error details = 4; // An array of details about specific errors that led to this reported error.
+}
+```
+
+### ClientVersionResponse
+
+```proto
+message ClientVersionResponse {
+    Error error = 1;
+    string version = 2; // 节点客户端版本
+}
+```
+
+### TransactionType  
+
+```proto
+enum TransactionType {
+  RECORD = 0; // 通用数据记录
+  MESSAGE = 1; // 消息
+  CONTRACT_CREATION = 2; // 合约创建
+  CONTRACT_INVOCATION = 3; // 合约调用
+}
+```
+
+### Transaction
+
+```proto
+message Transaction {
+  uint64 block_number = 1; // 事务所在的区块的区块号，当事务处于待确认状态时为`null`
+  bytes block_hash = 2; // 事务所在的区块的哈希，当事务处于待确认状态时为`null`
+  uint32 index = 3; // 事务在区块中的位置index，当事务处于待确认状态时为`null`
+  bytes hash = 4; // 事务的哈希
+  TransactionType type = 5; // 事务类型
+  bytes from = 6; // 发送账户地址
+  uint64 nonce = 7; // 这条事务之前发送者所发送的事务数量
+  bytes to = 8; // 接收账户地址，或者调用的合约地址，或者`null`如为合约创建
+  bytes data = 9; // 数据或合约代码
+  bytes v = 10; // ECDSA recovery id
+  bytes r = 11; // ECDSA signature r
+  bytes s = 12; // ECDSA signature s
+}
+```
+
+### Block
+
+```proto
+message Block {
+  uint64 number = 1; // 区块号，当区块处于待确认状态时为`null`
+  bytes hash = 2; // 区块的哈希，当区块处于待确认状态时为`null`
+  bytes parent_hash = 3; // 父区块的哈希
+  bytes witness = 4; // 见证者账户地址
+  uint64 timestamp = 5; // 区块产生时的UNIX时间戳
+  uint64 size = 6; // 区块大小的字节数
+  bytes transactions_root = 7; // 区块的事务树根
+  repeated Transaction transactions = 8; // 事务对象的数组，或为空
+  repeated bytes transaction_hashes = 9; // 32字节的交易哈希的数组，或为空
+}
+```
+
+### BlockResponse
+
+```proto
+message BlockResponse {
+    Error error = 1;
+    Block block = 2;
+}
+```
+
+### TransactionResponse
+
+```proto
+message TransactionResponse {
+    Error error = 1;
+    Transaction transaction = 2;
+}
+```
+
+---
+
+## Transaction ledger API
+
+### ClientVersion
+
+#### Request
+
+```
+google.protobuf.Empty
+```
+ 
+#### Response
+
+```
+bdchain.api.ClientVersionResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```
+(empty)
+```
+ 
+**Response**
+```yaml
+error: (empty Error object)
+version: 'TxLedgerGo/v0.0.1alpha/darwin/go1.11'
+```
+
+---
+
+### CreateLedger
+
+#### Request
+
+```proto
+message CreateLedgerRequest {
+  string name = 1;
+}
+```
+
+#### Response
+ 
+```proto
+message CreateLedgerResponse {
+  Error error = 1;
+}
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+name: 'test'
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+```
+
+##### 2
+
+**Request**
+
+Client:
+```yaml
+name: null
+```
+On the wire:
+```yaml
+name: '' (defualt value)
+```
+
+**Response**
+```yaml
+error:
+  code: 'BadArgument'
+  message: 'name must not be empty'
+  target: 'name'
+  details:
+```
+
+---
+
+### GetLedgers
+
+#### Request
+
+```
+google.protobuf.Empty
+```
+
+#### Response
+
+```proto
+message GetLedgersResponse {
+  Error error = 1;
+  repeated string ledgers = 2;
+}
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```
+(empty)
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+ledgers:
+  - 'first'
+  - 'second'
+  - 'third' 
+```
+
+---
+
+### SendTransaction
+
+#### Request
+
+```proto
+message SendTransactionRequest {
+  string ledger = 1;
+  message Transaction {
+    TransactionType type = 1;
+    bytes from = 2;
+    bytes to = 3;
+    bytes data = 4;
+  }
+  Transaction transaction = 2;
+}
+```
+
+#### Response
+
+```proto
+message SendTransactionResponse {
+  Error error = 1;
+  bytes hash = 2;
+}
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+transaction:
+  type: TransactionType.MESSAGE
+  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
+  data: 0xdeadbeef (in bytes)
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+hash: 0xd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5edd15ea5ed (in bytes)
+```
+
+##### 2
+
+**Request**
+```yaml
+ledger: 'test'
+transaction:
+  type: TransactionType.MESSAGE
+  from: null (in bytes)
+  to: 0x5obada55 (in bytes)
+  data: null (in bytes)
+```
+
+**Response**
+```yaml
+error:
+  code: 'BadArgument'
+  message: 'Multiple errors in transaction'
+  target: 'transaction'
+  details:
+    - code: 'EmptyValue'
+      message: 'from must not be empty'
+      target: 'from'
+      details:
+    - code: 'MalformedAddress'
+      message: 'to must be a valid 32-byte address'
+      target: 'to'
+      details:
+hash: (empty bytes, default value)
+```
+
+---
+
+## Accounting chain API
+
+### ClientVersion
+
+#### Request
+
+```
+google.protobuf.Empty
+```
+ 
+#### Response
+
+```
+bdchain.api.ClientVersionResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```
+(empty)
+```
+ 
+**Response**
+```yaml
+error: (empty Error object)
+version: 'AcChainGo/v0.0.1alpha/darwin/go1.11' 
+```
+
+---
+
+### BlockNumber
+
+#### Request
+
+```proto
+message BlockNumberRequest {
+  string ledger = 1;
+}
+```
+ 
+#### Response
+
+```proto
+message BlockNumberResponse {
+  Error error = 1;
+  uint64 block_number = 2;
+}
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+block_number: 2018
+```
+
+##### 2
+
+**Request**
+
+Client:
+```yaml
+ledger: null
+```
+On the wire:
+```yaml
+ledger: '' (defualt value)
+```
+
+**Response**
+```yaml
+error:
+  code: 'BadArgument'
+  message: 'name must not be empty'
+  target: 'name'
+  details:
+block_number: 0 (default value)
+```
+
+---
+
+### GetBlockByNumber
+
+#### Request
+
+```proto
+message GetBlockByNumberRequest {
+  string ledger = 1;
+  uint64 number = 2;
+  bool full_transaction = 3;
+}
+```
+ 
+#### Response
+
+```
+bdchain.api.BlockResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+number: 2018
+full_transaction: true
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+block: 
+  number: 2018
+  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+  timestamp: 2018050400000
+  size: 20180504
+  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+  transactions:
+    - block_number: 2018
+      block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+      index: 0
+      hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+      type: TransactionType.RECORD
+      from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+      nonce: 2018
+      to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+      data: 0xdeadbeef (in bytes)
+      v: 0x25 (in bytes)
+      r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+      s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+    - block_number: 2018
+      block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+      index: 1
+      hash: 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+      type: TransactionType.MESSAGE
+      from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+      nonce: 2019
+      to: 0xfeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabefeedbabe (in bytes)
+      data: (empty bytes, default value)
+      v: 0x25 (in bytes)
+      r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+      s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+  transaction_hashes:
+```
+
+##### 2
+
+**Request**
+
+Client:
+```yaml
+ledger: 'test'
+number: 2018
+full_transaction: null
+```
+On the wire:
+```yaml
+ledger: 'test'
+number: 2018
+full_transaction: false (defualt value)
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+block: 
+  number: 2018
+  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+  timestamp: 2018050400000
+  size: 20180504
+  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+  transactions:
+  transaction_hashes:
+    - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+    - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+```
+
+---
+
+### GetBlockByHash
+
+#### Request
+
+```proto
+message GetBlockByHashRequest {
+  string ledger = 1;
+  bytes hash = 2;
+  bool full_transaction = 3;
+}
+```
+ 
+#### Response
+
+```
+bdchain.api.BlockResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+full_transaction: false
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+block: 
+  number: 2018
+  hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  parent_hash: 0xbabefacebabefacebabefacebabefacebabefacebabefacebabefacebabeface (in bytes)
+  witness: 0x1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad1fee1bad (in bytes)
+  timestamp: 2018050400000
+  size: 20180504
+  transactions_root: 0x5obada555obada555obada555obada555obada555obada555obada555obada55 (in bytes)
+  transactions:
+  transaction_hashes:
+    - 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+    - 0x1313131313131313131313131313131313131313131313131313131313131313 (in bytes)
+```
+
+---
+
+### GetTransactionByHash
+
+#### Request
+
+```proto
+message GetTransactionByHashRequest {
+  string ledger = 1;
+  bytes hash = 2;
+}
+```
+ 
+#### Response
+
+```
+bdchain.api.TransactionResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+transaction:
+  block_number: 2018
+  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  index: 0
+  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+  type: TransactionType.RECORD
+  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  nonce: 2018
+  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  data: 0xdeadbeef (in bytes)
+  v: 0x25 (in bytes)
+  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+```
+
+---
+
+### GetTransactionByBlockNumberAndIndex
+
+#### Request
+
+```proto
+message GetTransactionByBlockNumberAndIndexRequest {
+  string ledger = 1;
+  uint64 block_number = 2;
+  uint32 index = 3;
+}
+```
+ 
+#### Response
+
+```
+bdchain.api.TransactionResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+block_number: 2018
+index: 0
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+transaction:
+  block_number: 2018
+  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  index: 0
+  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+  type: TransactionType.RECORD
+  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  nonce: 2018
+  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  data: 0xdeadbeef (in bytes)
+  v: 0x25 (in bytes)
+  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+```
+
+---
+
+### GetTransactionByBlockHashAndIndex
+
+#### Request
+
+```proto
+message GetTransactionByBlockHashAndIndexRequest {
+  string ledger = 1;
+  bytes block_hash = 2;
+  uint32 index = 3;
+}
+```
+ 
+#### Response
+
+```
+bdchain.api.TransactionResponse
+```
+
+#### Test cases
+
+##### 1
+
+**Request**
+```yaml
+ledger: 'test'
+block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+index: 0
+```
+
+**Response**
+```yaml
+error: (empty Error object)
+transaction:
+  block_number: 2018
+  block_hash: 0xdeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcodedeadcode (in bytes)
+  index: 0
+  hash: 0x0404040404040404040404040404040404040404040404040404040404040404 (in bytes)
+  type: TransactionType.RECORD
+  from: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  nonce: 2018
+  to: 0xf00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafef00dcafe (in bytes)
+  data: 0xdeadbeef (in bytes)
+  v: 0x25 (in bytes)
+  r: 0x1b5e176d927f8e9ab405058b2d2457392da3e20f328b16ddabcebc33eaac5fea (in bytes)
+  s: 0x4ba69724e8f69de52f0125ad8b3c5c2cef33019bac3249e2c0a2192766d1721c (in bytes)
+```